R-3=4-12-7

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Solution for R-3=4-12-7 equation: 


Simplifying
R + -3 = 4 + -12 + -7

Reorder the terms:
-3 + R = 4 + -12 + -7

Combine like terms: 4 + -12 = -8
-3 + R = -8 + -7

Combine like terms: -8 + -7 = -15
-3 + R = -15

Solving
-3 + R = -15

Solving for variable 'R'.

Move all terms containing R to the left, all other terms to the right.

Add '3' to each side of the equation.
-3 + 3 + R = -15 + 3

Combine like terms: -3 + 3 = 0
0 + R = -15 + 3
R = -15 + 3

Combine like terms: -15 + 3 = -12
R = -12

Simplifying
R = -12

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